Muscle therapy device



FIG. 1 is a perspective view of a muscle therapy device showing the design;

FIG. 2 is a front elevation view thereof, where the rear elevation view, the top plan view, and the bottom plan view all are a mirror image thereof.

FIG. 3 is a left elevation view thereof; and,

FIG. 4 is a right elevation view thereof.

Broken lines in the drawings are for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a muscle therapy device, as shown and described. 